Read by QxMD icon Read

Genetic bipolar

Mark A Frye, Euijung Ryu, Malik Nassan, Gregory D Jenkins, Ana C Andreazza, Jared M Evans, Susan L McElroy, Devin Oglesbee, W Edward Highsmith, Joanna M Biernacka
Converging genetic, postmortem gene-expression, cellular, and neuroimaging data implicate mitochondrial dysfunction in bipolar disorder. This study was conducted to investigate whether mitochondrial DNA (mtDNA) haplogroups and single nucleotide variants (SNVs) are associated with sub-phenotypes of bipolar disorder. MtDNA from 224 patients with Bipolar I disorder (BPI) was sequenced, and association of sequence variations with 3 sub-phenotypes (psychosis, rapid cycling, and adolescent illness onset) was evaluated...
September 30, 2016: Journal of Psychiatric Research
Hilde de Kluiver, Jacobine E Buizer-Voskamp, Conor V Dolan, Dorret I Boomsma
We review the hypotheses concerning the association between the paternal age at childbearing and childhood psychiatric disorders (autism spectrum- and attention deficit/hyperactive disorder) and adult disorders (schizophrenia, bipolar-, obsessive-compulsive-, and major depressive disorder) based on epidemiological studies. Several hypotheses have been proposed to explain the paternal age effect. We discuss the four main-not mutually exclusive-hypotheses. These are the de novo mutation hypothesis, the hypothesis concerning epigenetic alterations, the selection into late fatherhood hypothesis, and the environmental resource hypothesis...
October 22, 2016: American Journal of Medical Genetics. Part B, Neuropsychiatric Genetics
Isaac Garrido-Benavent, Sergio Pérez-Ortega, Asunción de Los Ríos
Symbiotic associations between green algae (Chlorophyta) and fungi give rise to morphologically and eco-physiologically distinct entities, or so-called, lichens. In one of the most peculiar of these associations, the partners are species of the macroscopic genus Prasiola (Trebouxiophyceae) and the ascomycete Mastodia tessellata (Verrucariaceae). This is the only known case of a lichen symbiosis involving a foliose green alga. Despite intense research targeted at understanding the biology of this particular association, little is known about the genetic variability of its symbionts...
October 18, 2016: Molecular Phylogenetics and Evolution
Hye-Young Jung, Sangseob Leem, Sungyoung Lee, Taesung Park
BACKGROUND: Gene-gene interaction (GGI) is one of the most popular approaches for finding the missing heritability of common complex traits in genetic association studies. The multifactor dimensionality reduction (MDR) method has been widely studied for detecting GGIs. In order to identify the best interaction model associated with disease susceptibility, MDR compares all possible genotype combinations in terms of their predictability of disease status from a simple binary high(H) and low(L) risk classification...
September 29, 2016: Computational Biology and Chemistry
Suzanne Gonzalez, Jayanta Gupta, Erika Villa, Indika Mallawaarachchi, Marco Rodriguez, Mercedes Ramirez, Juan Zavala, Regina Armas, Albana Dassori, Javier Contreras, Deborah Flores, Alvaro Jerez, Alfonso Ontiveros, Humberto Nicolini, Michael Escamilla
OBJECTIVES: Recent genome-wide association studies (GWASs) have identified numerous putative genetic polymorphisms associated with bipolar disorder (BD) and/or schizophrenia (SC). We hypothesized that a portion of these polymorphisms would also be associated with BD in the Latino American population. To identify such regions, we tested previously identified genetic variants associated with BD and/or SC and ancestral haploblocks containing these single nucleotide polymorphisms (SNPs) in a sample of Latino subjects with BD...
September 2016: Bipolar Disorders
Damla Tokac, Erdem Tuzun, Huseyin Gulec, Vuslat Yılmaz, Elif Sinem Bireller, Bedia Cakmakoglu, Cem Ismail Kucukali
OBJECTIVE: Bipolar disorder (BD) is a debilitating psychiatric disease with unknown etiology. Recent studies have shown inflammation as a potential contributing factor of BD pathogenesis. However, potential associations between chemokine and chemokine receptor polymorphisms and BD have been fundamentally understudied. To identify participation of chemokines in BD pathogenesis, we examined genetic variants of several chemokine and chemokine receptor genes. METHODS: The study population comprised 200 patients with BD and 195 age- and sex-matched healthy controls...
September 2016: Psychiatry Investigation
Chin B Eap
The use of pharmacogenetic tests was already being proposed in psychiatry in the early 2000s because genetic factors were known to influence drug pharmacokinetics and pharmacodynamics. However, sufficient levels of evidence to justify routine use have been achieved for only a few tests (eg, major histocompatibility complex, class I, B, allele 1502 [HLA-B*1502] for carbamazepine in epilepsy and bipolar disorders); many findings are too preliminary or, when replicated, of low clinical relevance because of a small effect size...
September 2016: Dialogues in Clinical Neuroscience
Angelo Alonzo, Scott Aaronson, Marom Bikson, Mustafa Husain, Sarah Lisanby, Donel Martin, Shawn M McClintock, William M McDonald, John O'Reardon, Zeinab Esmailpoor, Colleen Loo
Transcranial Direct Current Stimulation (tDCS) is a new, non-invasive neuromodulation approach for treating depression that has shown promising efficacy. The aim of this trial was to conduct the first international, multicentre randomised controlled trial of tDCS as a treatment for unipolar and bipolar depression. The study recruited 120 participants across 6 sites in the USA and Australia. Participants received active or sham tDCS (2.5mA, 20 sessions of 30min duration over 4weeks), followed by a 4-week open label active treatment phase and a 4-week taper phase...
October 15, 2016: Contemporary Clinical Trials
Jan Scott, Pierre Alexis Geoffroy, Sarah Sportiche, Clara Brichant-Petit-Jean, Sebastien Gard, Jean-Pierre Kahn, Jean-Michel Azorin, Chantal Henry, Bruno Etain, Frank Bellivier
BACKGROUND: It is increasingly recognised that reliable and valid assessments of lithium response are needed in order to target more efficiently the use of this medication in bipolar disorders (BD) and to identify genotypes, endophenotypes and biomarkers of response. METHODS: In a large, multi-centre, clinically representative sample of 300 cases of BD, we assess external clinical validators of lithium response phenotypes as defined using three different recommended approaches to scoring the Alda lithium response scale...
October 11, 2016: Journal of Affective Disorders
E Rizos, N Siafakas, E Skourti, C Papageorgiou, J Tsoporis, T H Parker, D I Christodoulou, D A Spandidos, E Katsantoni, V Zoumpourlis
Schizophrenia (SZ) and cancer (Ca) have a broad spectrum of clinical phenotypes and a complex biological background, implicating a large number of genetic and epigenetic factors. SZ is a chronic neurodevelopmental disorder signified by an increase in the expression of apoptotic molecular signals, whereas Ca is conversely characterized by an increase in appropriate molecular signaling that stimulates uncontrolled cell proliferation. The rather low risk of developing Ca in patients suffering from SZ is a hypothesis that is still under debate...
October 14, 2016: Molecular Medicine Reports
Martina Hahn, Sibylle C Roll
A 50-year-old male patient with comorbid human immunodeficiency virus developed a relapse of bipolar disorder after a switch from oral aripiprazole 10 mg/day to intramuscular aripiprazole depot 200 mg every 28 days plus oral aripiprazole 5 mg/day. The patient was concomitantly taking lopinavir, saquinavir, ritonavir, silybum marianum extract, and omeprazole. Only 1 week after the switch, the patient developed mood swings, irritability, depressive mood, and lack of drive. The oral aripiprazole was increased again to stabilize the patient...
December 2016: Drug Saf Case Rep
Stefania Prendes-Alvarez, Charles B Nemeroff
Personalized or precision medicine is a medical discipline that proposes tailoring health care to each individual by integrating data from their genetic makeup, epigenetic modifications, other biomarkers, clinical symptoms and environmental exposures. Currently, patients typically present for treatment of mood disorders relatively late in the disease course and this is of great concern both because delay in attaining remission reduces the success of subsequent treatment and depressive episodes have negative cumulative effects on the brain and body...
October 13, 2016: Neuroscience Letters
Chelsie E Benca, Jaime L Derringer, Robin P Corley, Susan E Young, Matthew C Keller, John K Hewitt, Naomi P Friedman
Executive functions (EFs) have been proposed as an endophenotype for psychopathology because EF deficits are associated with most psychiatric disorders. To examine this hypothesis, we derived polygenic risk scores for autism, attention-deficit/hyperactive disorder (ADHD), bipolar disorder, major depression (MDD), and schizophrenia, using genome-wide data from the Psychiatric Genomics Consortium as discovery samples. We then examined the relationships between these polygenic risk scores and three separable EF components measured with a latent variable model...
October 14, 2016: Behavior Genetics
Frank Qiu, Hagop S Akiskal, John R Kelsoe, Tiffany A Greenwood
BACKGROUND: Temperament and personality traits have been suggested as endophenotypes for bipolar disorder based on several lines of evidence, including heritability. Previous work suggested an anxious-reactive factor identified across temperament and personality inventories that produced significant group discrimination and could potentially be useful in genetic analyses. We have attempted to further characterize this factor structure in a sample of bipolar patients. METHODS: A sample of 1195 subjects with bipolar I disorder was evaluated, all with complete data available...
October 2, 2016: Journal of Affective Disorders
Kelly E Gill, Stephanie A Cardenas, Layla Kassem, Thomas G Schulze, Francis J McMahon
BACKGROUND: Anabaptists comprise large and growing Amish and Mennonite populations with a unique genetic heritage and cultural background. Little is known about the symptoms and course of major mood disorders in Anabaptists. Even less is known about the impact of potential moderators on symptom severity and course. METHODS: A sample of Amish and Mennonite participants with bipolar, recurrent unipolar, or schizoaffective bipolar disorder (n = 155) were systematically evaluated with a well-validated instrument...
December 2016: International Journal of Bipolar Disorders
Morgane Milienne-Petiot, James P Kesby, Mary Graves, Jordy van Enkhuizen, Svetlana Semenova, Arpi Minassian, Athina Markou, Mark A Geyer, Jared W Young
BACKGROUND: Bipolar disorder (BD) mania patients exhibit poor cognition and reward-seeking/hypermotivation, negatively impacting a patient's quality of life. Current treatments (e.g., lithium), do not treat such deficits. Treatment development has been limited due to a poor understanding of the neural mechanisms underlying these behaviors. Here, we investigated putative mechanisms underlying cognition and reward-seeking/motivational changes relevant to BD mania patients using two validated mouse models and neurochemical analyses...
October 9, 2016: Neuropharmacology
Roberta Fraschini
Mitosis is the last phase of the cell cycle and it leads to the formation of two daughter cells with the same genetic information. This process must occurr in a very precise way and this task is essential to preserve genetic stability and to maintain cell viability. Accurate chromosome segregation during mitosis is brought about by an important cellular organelle: the mitotic spindle. This structure is made of microtubules, polymers of alpha and beta tubulin, and it is highly dynamic during the cell cycle: it emanates from two microtubules organizing centers (Spindle Pole Bodies, SPBs, in yeast) that are essential to build a short bipolar spindle, and it undergoes two steps of elongation during anaphase A and anaphase B in order to separate sister chromatids...
October 9, 2016: Advances in Experimental Medicine and Biology
Merel M Schreuder, Christiaan H Vinkers, Esther Mesman, Stephan Claes, Willem A Nolen, Manon H J Hillegers
Children of a parent with bipolar disorder (bipolar offspring) have an increased risk for mood disorders. While genetic factors play a significant role in this population, susceptibility to environmental stress may also significantly contribute to this vulnerability for mood disorders. Childhood trauma has consistently been found to increase the risk for mood disorders, with persisting consequences for hypothalamic-pituitary-adrenal (HPA) axis functionality. However, it is currently unknown whether childhood trauma specifically affects HPA axis activity in individuals with a familial risk for bipolar disorder...
September 24, 2016: Psychoneuroendocrinology
Chih-Ken Chen, Chau-Shoun Lee, Hsuan-Yu Chen, Lawrence Shih-Hsin Wu, Jung-Chen Chang, Chia-Yih Liu, Andrew Tai-Ann Cheng
BACKGROUND: Genetic variants and medication adherence have been identified to be the main factors contributing to lithium treatment response in bipolar disorders. AIMS: To simultaneously examine effects of variant glutamate decarboxylase-like protein 1 (GADL1) and medication adherence on response to lithium maintenance treatment in Han Chinese patients with bipolar I (BPI) disorder. METHOD: Frequencies of manic and depressive episodes between carriers and non-carriers of the effective GADL1 rs17026688 T allele during the cumulative periods of off-lithium, poor adherence to lithium treatment and good adherence to lithium treatment were compared in Han Chinese patients with BPI disorder (n=215)...
September 2016: BJPsych Open
Mavi Deniz Ozel, Mehmet Emin Onder, Ali Sazci
The transcription factor 4 (TCF4) gene encodes a helix-loop-helix transcription factor protein, which initiates neuronal differentiation and is primarily expressed during nervous system development. The aim of the present study is to investigate the association of the TCF4 rs9960767 polymorphism and bipolar disorder, which is highly heritable. DNA isolation was performed on 95 patients with bipolar disorder and 108 healthy control subjects to examine the TCF4 rs9960767 polymorphism. Genotypic and allelic frequencies were determined using the polymerase chain reaction-restriction fragment length polymorphism method designed in our laboratory...
October 2016: Biomedical Reports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"